US7631379B2 - High/low bed and leg assembly for raising and lowering the high/low bed - Google Patents
High/low bed and leg assembly for raising and lowering the high/low bed Download PDFInfo
- Publication number
- US7631379B2 US7631379B2 US11/544,536 US54453606A US7631379B2 US 7631379 B2 US7631379 B2 US 7631379B2 US 54453606 A US54453606 A US 54453606A US 7631379 B2 US7631379 B2 US 7631379B2
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- US
- United States
- Prior art keywords
- main frame
- bed
- leg
- legs
- raised position
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active, expires
Links
- 239000003381 stabilizer Substances 0.000 claims abstract description 28
- 210000002414 leg Anatomy 0.000 description 49
- 230000000694 effects Effects 0.000 description 5
- 210000003127 knee Anatomy 0.000 description 4
- 238000013459 approach Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C19/00—Bedsteads
- A47C19/04—Extensible bedsteads, e.g. with adjustment of length, width, height
- A47C19/045—Extensible bedsteads, e.g. with adjustment of length, width, height with entire frame height or inclination adjustments
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
- A61G7/002—Beds specially adapted for nursing; Devices for lifting patients or disabled persons having adjustable mattress frame
- A61G7/012—Beds specially adapted for nursing; Devices for lifting patients or disabled persons having adjustable mattress frame raising or lowering of the whole mattress frame
Definitions
- This invention relates in general to beds and in particular, to high/low beds, which are beds that are adapted to be raised and lowered relative to a supporting support, such as a floor. Most particularly, the invention relates to a linkage assembly for high/low beds.
- a conventional high/low bed includes a sleep surface supported by a main frame.
- the main frame is supported by a pair of opposing legs (i.e., legs at opposite ends of the main frame).
- the sleep surface often includes a head section, a foot section, and a knee section between the head and foot sections.
- the head and knee sections are pivotally supported by a main frame so that they may be raised and lowered relative to the main frame.
- the foot section is pivotally connected to the knee section so that it moves in response to movement of the knee section.
- the legs of the bed are movable. Movement of the legs changes the position of the main frame relative to a supporting surface (i.e., a floor or the ground) by raising or lowering the main frame.
- the physical structure of the high/low bed often limits its ability to achieve desired minimum and maximum elevations. For example, forces acting upon the legs are greatest when the bed first begins to rise from its lowest position. These forces resist movement of the legs if the angular disposition of the legs is too great. As the legs come closer to being horizontal, when the bed is in its lowered position, a greater amount of force is required to start the legs in motion to raise the bed. The force can become so great that a cost-effective mechanical means for displacing the legs could be ineffective.
- the present invention is directed towards a bed that meets the foregoing needs.
- the bed comprises a main frame, a leg comprising at least one leg member and at least one link, and a stabilizer connecting the leg member to the main frame. At least portions of the main frame, the leg, the link, and the stabilizer form a four bar system for raising and lowering the bed.
- FIG. 1 is a bottom perspective view of a high/low bed in a lowered position.
- FIG. 2 is a side elevational view of the high/low bed shown in FIG. 1 .
- FIG. 3 is a bottom perspective view of the high/low bed shown in FIG. 1 in a raised position.
- FIG. 4 is a side elevational view of the high/low bed shown in FIG. 3 .
- FIG. 5 is a diagrammatic representation of a mechanism for the high/low bed having multiple actuators.
- FIG. 6 is a diagrammatic representation of another mechanism having multiple actuators.
- FIG. 7 is a diagrammatic representation of yet another mechanism for the high/low bed having multiple actuators.
- FIG. 8 is a diagrammatic representation showing effects of locations of actuator rod connection points relative to actuator force requirements.
- FIG. 9 is a diagrammatic representation further showing effects of locations of actuator rod connection points relative to actuator force requirements.
- FIG. 10 is a side elevational view of another high/low bed.
- FIG. 11 is a bottom perspective view of the high/low bed as shown in FIG. 10 .
- FIGS. 1-4 a bed 10 comprising a sleep surface 12 supported by a main frame 14 .
- the main frame 14 is supported by a pair of opposing legs 16 and corresponding stabilizers 18 (i.e., legs and stabilizers at opposite ends of the main frame 14 ).
- the legs 16 and the stabilizers 18 are located primarily below the main frame 14 to provide subjacent support for the main frame 14 .
- the legs 16 and the stabilizers 18 are operatively attached to the main frame 14 and one another so as to be movable relative to the main frame 14 and one another.
- the legs 16 and the stabilizers 18 are movable to permit the elevation of the main frame 14 to be varied relative to a supporting surface.
- the entire main frame 14 may be lowered or raised relative to the supporting surface by raising and lowering the head and foot ends 26 , 28 of the main frame 14 .
- the main frame 14 includes opposing side rails 40 that extend in a longitudinal direction from a head end 42 and a foot end 44 and are joined together by head and foot rails 46 , 48 (shown in FIG. 1 ).
- the legs 16 preferably include upper bent leg members 54 and a lower laterally extending foot member 56 (shown in FIGS. 1 and 3 ).
- the leg member 54 includes an upper portion and a lower portion, separated by the bend.
- the bend in the leg members 54 is in the longitudinal direction.
- the bend in the leg members 54 is preferred to limit longitudinal travel (i.e., travel in left or right directions when viewing the drawings) of the lower laterally extending foot member 56 and thus limit travel of the bed 10 . As can be seen in reference to FIGS.
- the spacing between the foot members 56 at the head end 42 and foot end 44 of the main frame 14 when the bed 10 is in a lowered position (as shown in FIG. 2 ), is substantially the same as the spacing when the bed 10 is in a raised position (as shown in FIG. 4 ).
- the longitudinal position of the foot members 56 relative to the main frame 14 when the bed 10 is in the lowered position is substantially the same as the longitudinal position of the foot members 56 relative to the main frame 14 when the bed 10 is in the raised position.
- the lateral extent of the foot members 56 may exceed the bent leg members 54 for attachment of wheels, such as the conventional shaped wheels 58 and the pentagonal shaped wheels 58 ′ shown.
- the pentagonal shaped wheels 58 ′ have a flat surface for resisting movement of the bed 10 on the supporting surface.
- the bed 10 may be provided with a wheel and brake assembly 120 comprising one or more conventional wheels the movement of which is resisted or prevented by a brake that is activated by a brake lever, as shown in FIG. 10 .
- the stabilizers 18 are connected between the bent leg members 56 and the main frame 14 . According to the preferred embodiment of the invention, the stabilizers 18 are connected to brackets 88 mounted to the head and foot rails 46 , 48 of the main frame 14 .
- each bent leg member 54 is pivotally displaceable relative to a lower portion of a link 55 at a first orbital pivot point, designated at A.
- a laterally extending member 57 extends between upper portions of opposing laterally spaced links 55 .
- the laterally spaced links 55 and the laterally extending member 57 form a link assembly, generally indicated at 59 .
- the laterally extending member 57 is pivotally displaceable relative to the side rails 40 of the main frame 14 at a first fixed pivot point, designated at B.
- a lower intermediate portion of each bent leg member 54 is pivotally connected to a lower portion of a corresponding stabilizer 18 at a second orbital pivot point designated at C.
- each stabilizer 18 is pivotally connected to a corresponding stabilizer bracket 88 at a second fixed pivot point, designated at D.
- D a second fixed pivot point
- the fixed pivot points B, D are preferably at different elevations so as to deviate from a traditional parallelogram.
- a parallel relationship between the stabilizer 18 and the link 55 may result in a loss in mechanical advantage. Consequently, a non-parallel relationship is preferred.
- translation i.e., longitudinal travel of the lower laterally extending foot member 56
- minimization of translation in the industry is desirable.
- Orbital displacement of the first and second orbital pivot points A, C may be achieved as follows.
- the laterally extending member 57 extending between the upper portions of the opposing laterally spaced links 55 may be provided with a yoke 70 .
- the yoke 70 is adapted to pivotally receive a first end of an actuator rod 82 .
- the first end of the actuator rod 82 is pivotally displaceable relative to the yoke 70 about a pivot axis E extending through the yoke 70 .
- the actuator rod 82 is longitudinally displaceable to pivot the laterally extending member 57 about point B, which in turn moves the laterally spaced links 55 . Movement of the laterally spaced links 55 causes the bent leg members 54 to move downward, which in turn causes the orbital pivot points A, C to move along an orbital path relative to the line L-L in FIG. 4 by virtue of the connection between the bent leg members 54 and the stabilizer 18 . This causes the bed to raise or lower the bed 10 .
- the yoke 70 is preferably oriented so as to be extending substantially vertically below the laterally extending member 57 (i.e., bottom dead center of the laterally extending member 57 ) when the main frame 14 is positioned halfway between its lower position and raised position. At this juncture, the yoke 70 may be vertically situated between the upper laterally extending member 57 and the lower laterally extending foot member 56 supporting the wheels 58 , 58 ′.
- pivotal movement of the laterally extending member 57 in a direction of arrow O about the movable upper pivot point B has the effect of rotating the links 55 in a downward direction while the stabilizers 18 urge the legs 16 downward in the direction of arrow P about the first orbital pivot point A divergent from the links 55 .
- movement of the laterally extending member 57 in a direction opposite to that of arrow O has the effect of rotating the links 55 in an upward direction while the stabilizers 18 pull the legs 16 upward in a direction opposite to that of arrow P about the first orbital pivot point A, convergent toward the links 55 .
- the actuator rod 82 may be supported for pivotal movement relative to a pivot plate 90 .
- the pivot plate 90 is supported for rotation relative to the main frame 14 via a first or main pivot point, indicated at F.
- the pivot plate 90 is supported for rotation in a plane that is substantially horizontal, or substantially parallel to the main frame 14 or the supporting surface.
- the first pivot point F is supported along a pivot axis that is substantially vertical, or substantially perpendicular to the main frame 14 or the supporting surface.
- a pair of actuator rods 82 is supported for pivotal movement relative to a pivot plate 90 , each at a second pivot point, indicated at G.
- pivot points G are oppositely disposed relative to the first pivot point F, and are spaced equidistantly apart from the main pivot point F.
- Each actuator rod 82 extends from the pivot plate 90 to the yoke 70 of a corresponding link assembly 59 for driving the legs 16 at the head and foot ends 26 , 28 of the main frame 14 .
- the pivot plate 90 may be driven for rotation by an actuator 94 , such as the linear actuator shown.
- the actuator 94 may be supported for pivotal movement at a first end 96 relative to the pivot plate 90 at a third pivot point, designated at H.
- a second end 100 of the actuator 94 may be pivotally displaceable relative to the main frame 14 at a fourth pivot point, designated at I.
- Movement of the actuator 94 along the lines M-M rotates the pivot plate 90 about the first pivot point F to simultaneously drive each of the actuator rods 82 .
- the actuator rods 82 simultaneously drive the link assemblies 59 , which drive the legs 16 .
- the pivot plate 90 may function as a lever arm so that the actuator 94 may provide a greater mechanical advantage and/or increase the speed of the mechanism, depending on the relative positions of pivot points F, H.
- one or more other actuators may be connected to the pivot plate 90 , together with the actuator 94 , for rotating the pivot plate 90 .
- another actuator 94 may be connected to the pivot plate 90 and may pull the pivot plate 90 as the first actuator 94 pushes the pivot plate 90 , and vice versa, as diagrammatically illustrated in FIG. 5 .
- an actuator 94 may be connected to the pivot plate 90 and may push the pivot plate 90 as the first actuator 94 pushes the pivot plate 90 , as diagrammatically illustrated in FIG. 6 .
- actuators 94 may be connected to the pivot plate 90 to both push and pull the pivot plate 90 simultaneously, as diagrammatically illustrated in FIG. 7 .
- the locations of the second pivot points G may affect the amount of force required by the actuator 94 and the translation (i.e., longitudinal travel of the lower laterally extending foot member 56 ). For example, by moving the second pivot points G outward and away from the first pivot F, as shown in FIG. 9 , the amount of force required by the actuator 94 may increase but translation may decrease. Conversely, by moving the second pivot points G inward and toward the first pivot F, as shown in FIG. 8 , the amount of force required by the actuator 94 may decrease but translation may increase.
- the actuator rods 82 are not perpendicular relative to the pivot plate 90 .
- a perpendicular approach to the pivot plate 90 may require more force from the actuator 94 to rotate the pivot plate to in turn drive the actuator rods 82 and displace the legs 16 , although this may be dependent on other factors, such as the use of other actuator rods 82 or legs 16 .
- the actuator 94 approaches the pivot plate at an angle of about 30 degrees, although other angles may be suitable for carrying out the invention.
- the pivot plate 90 rotates substantially parallel to the main frame 14 and the supporting surface and thus allows a low profile mechanism for use in a hi/low bed. Tie rod ends or rod eyes (i.e., on the ends of the actuator rods 82 ) may allow at least two degrees of freedom, which may be desirable for operation of the bed 10 . It should also be noted that the pivot plate 90 functions as a lever arm to provide additional leverage from the actuator 94 , which in turn may provide adequate force to lift the bed 10 with loads commensurate with industry standards, where conventional beds may fail. This is particularly advantageous in instances where adequate force to lift the bed is provided with a fixed amount of thrust from a DC actuator in a compact form.
- FIGS. 10 and 11 there is illustrated a high/low bed 110 , which may have legs 112 similar to the bed 10 described above. However, unlike the bed 10 described above, which has legs 18 that move in diverging and converging directions, the legs 112 of the bed 110 shown in FIGS. 10 and 11 move in like directions. It should be noted that the legs 112 are simultaneously driven by actuating rods 114 , like the bed 10 above, but the actuating rods move in the same direction, not in opposite directions, like the bed 10 described above.
- the actuating rods 114 are supported for pivotal movement relative to a pivot plate 116 , each at a second pivot point indicated at V, on a like side of a first or main pivot point K, unlike the bed 10 described above wherein the corresponding pivot points G are oppositely disposed relative to the first pivot point F.
- the second pivot points J are substantially coincident and thus spaced substantially equidistantly apart from the first pivot point K, the invention may be practiced in another suitable manner.
- the actuating rods 114 need not be the same length but may be of different lengths, as shown in the drawings.
- the bed 110 need not have pentagonal shaped wheels 58 ′, like the bed 10 described above, but instead may be provide with a wheel and brake assembly 120 comprising one or more conventional wheels the movement of which is resisted or prevented by a brake that is activated by a brake lever, as shown in FIG. 10 .
- pivot plate shown and described above is provided for illustrative purposes and that the invention may be used with linkages other than that shown and described above.
- actuators may be connected directly or indirectly to the legs 16 , without a linkage.
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- Health & Medical Sciences (AREA)
- Nursing (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Invalid Beds And Related Equipment (AREA)
Abstract
Description
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/544,536 US7631379B2 (en) | 2005-10-14 | 2006-10-09 | High/low bed and leg assembly for raising and lowering the high/low bed |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US72675505P | 2005-10-14 | 2005-10-14 | |
US72675405P | 2005-10-14 | 2005-10-14 | |
US11/544,536 US7631379B2 (en) | 2005-10-14 | 2006-10-09 | High/low bed and leg assembly for raising and lowering the high/low bed |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/705,760 Division US8394598B2 (en) | 2003-02-21 | 2010-02-15 | Tyrosine kinome |
Publications (2)
Publication Number | Publication Date |
---|---|
US20070083993A1 US20070083993A1 (en) | 2007-04-19 |
US7631379B2 true US7631379B2 (en) | 2009-12-15 |
Family
ID=37913496
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/544,536 Active 2027-07-26 US7631379B2 (en) | 2005-10-14 | 2006-10-09 | High/low bed and leg assembly for raising and lowering the high/low bed |
US11/544,533 Abandoned US20070083992A1 (en) | 2005-10-14 | 2006-10-09 | High/low bed and rotational linkage for driving the high/low bed |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/544,533 Abandoned US20070083992A1 (en) | 2005-10-14 | 2006-10-09 | High/low bed and rotational linkage for driving the high/low bed |
Country Status (2)
Country | Link |
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US (2) | US7631379B2 (en) |
CA (1) | CA2563868A1 (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
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US20090272953A1 (en) * | 2008-04-30 | 2009-11-05 | Roland Wolf | Lift apparatus |
US8800080B2 (en) | 2011-09-01 | 2014-08-12 | Drive Medical Design & Mfg. | Long term care bed |
US9101516B2 (en) | 2003-03-11 | 2015-08-11 | Stryker Corporation | Steerable ultra-low patient bed |
US9314385B2 (en) | 2011-04-11 | 2016-04-19 | Pratt & Whitney Canada Corp. | Piece of furniture, such as an adjustable bed, having an adjustable platform |
US20160287459A1 (en) * | 2005-12-19 | 2016-10-06 | Stryker Corporation | Patient support apparatus with lift system |
US9603764B2 (en) | 2014-02-11 | 2017-03-28 | Medline Industries, Inc. | Method and apparatus for a locking caster |
US9994072B2 (en) | 2014-09-17 | 2018-06-12 | Medical Depot, Inc. | Patient care bed |
US9999558B2 (en) | 2011-04-11 | 2018-06-19 | Usine Rotec Inc. | Piece of furniture, such as an adjustable bed, having an adjustable platform |
US10111790B2 (en) | 2014-06-13 | 2018-10-30 | Medical Depot, Inc. | Long term care bed |
US10130536B2 (en) | 2013-09-06 | 2018-11-20 | Stryker Corporation | Patient support usable with bariatric patients |
US10188569B2 (en) | 2013-09-06 | 2019-01-29 | Stryker Corporation | Patient support usable with bariatric patients |
US10842701B2 (en) | 2016-10-14 | 2020-11-24 | Stryker Corporation | Patient support apparatus with stabilization |
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US7013510B1 (en) * | 2004-04-14 | 2006-03-21 | Raye's, Inc. | Low profile hospital bed |
US7631379B2 (en) * | 2005-10-14 | 2009-12-15 | Joerns Healthcare Inc. | High/low bed and leg assembly for raising and lowering the high/low bed |
US7703157B2 (en) * | 2006-02-11 | 2010-04-27 | Völker AG | Bed, in particular sickbed or nursing bed |
US7509697B2 (en) * | 2006-02-11 | 2009-03-31 | Völker AG | Height-adjustable bed |
DE202008008521U1 (en) * | 2008-06-28 | 2008-09-04 | Flamme, Klaus Peter | Adjustment device for beds and reclining furniture |
AU2010201432B2 (en) * | 2009-04-17 | 2015-01-22 | Maxi-Care Promotions Pty. Ltd. | Pedestal end for patients bed |
EP2873400B1 (en) | 2013-11-18 | 2018-01-31 | Völker GmbH | Person support apparatus |
FR3021210B1 (en) * | 2014-05-20 | 2016-06-10 | Medicatlantic Sa | MEDICALIZED BED HAVING A SAFE POSITION FOR TRANSVERSAL MOVEMENTS HEADACHE |
CN104433486B (en) | 2014-10-29 | 2018-03-06 | 嘉兴赛诺机械有限公司 | Electric drive mechanism and electric furniture |
US11076704B2 (en) * | 2016-11-16 | 2021-08-03 | Sino International Group Limited | Motorized bed |
US10555859B2 (en) * | 2017-03-21 | 2020-02-11 | Industrial Woodworking Corporation | Height adjustment delivery table |
CN108272572A (en) * | 2018-01-18 | 2018-07-13 | 中国人民解放军白求恩国际和平医院 | It is moveable multifunctional hospital bed |
US20220240684A1 (en) * | 2021-02-02 | 2022-08-04 | Zenithen USA LLC d/b/a Z Company | Folding bed frame |
US11957248B2 (en) * | 2022-04-05 | 2024-04-16 | L&P Property Management Company | Adjustable bed base with subframe for lift and tilt |
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- 2006-10-09 US US11/544,536 patent/US7631379B2/en active Active
- 2006-10-09 US US11/544,533 patent/US20070083992A1/en not_active Abandoned
- 2006-10-12 CA CA002563868A patent/CA2563868A1/en not_active Abandoned
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US20070083993A1 (en) | 2007-04-19 |
CA2563868A1 (en) | 2007-04-14 |
US20070083992A1 (en) | 2007-04-19 |
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